Scientists / Open questions

Yoshinori Tokura

Strongly correlated electrons; multiferroics

16 questions

Microscopic origin, interface-state structure, and kinetics of forming and resistive switching at the Ti/Pr0.7Ca0.3MnO3 rectifying interface
Microscopic origin and quantitative physical characterization of the nanometric square skyrmion lattice in the centrosymmetric magnet GdRu2Si2 and the RM2X2 family
Microscopic origin of the hysteretic interface-type resistance switching at the epitaxial SrRuO3/SrTi0.99Nb0.01O3 Schottky junction
Microscopic origin and compensation of the interfacial magnetic dead layer in manganite/insulator tunnel junctions, and its quantitative link to room-temperature tunneling magnetoresistance
Vibrationally driven insulator-to-metal transition in magnetoresistive manganites: phonon-mode specificity, anharmonic energy redistribution, spin dynamics, and lifetime of the metastable metallic phase
Unique microscopic magnetic structure of the field-induced noncoplanar phase in bulk MnGe and the origin of its short, temperature-dependent helical period
Microscopic origin, stability conditions, and control of helicity reversals in dipolar skyrmion-bubble and stripe textures (random-chirality skyrmion lattices and multi-ring skyrmions)
Microscopic mechanism of the ionic-liquid-gate-induced bulk metal–insulator transition in vanadium dioxide films
Microscopic origin of the chirality-induced Hall anomaly in MnSi under pressure: texture identity, field thresholds, quantitative topological-charge mapping, and relation to the partial-order state
Quantitative microscopic origin of ferroelectricity and of its nonlinear pressure response in hydrogen-bonded supramolecular co-crystals of phenazine and anilic acids
The square meron–antimeron lattice in the chiral magnet Co8Zn9Mn3 and its transformation into a skyrmion lattice: three-dimensional magnetic configuration, strain and anisotropy control, transition energetics, and emergent electromagnetic response
Microscopic structure and formation mechanism of the current-stabilized conducting path in the light-induced insulator–metal transition of Pr $_{0.7}$ Ca $_{0.3}$ MnO $_3$
Microscopic origin of residual magnetic anisotropy and the quantitative polarization–spin-chirality relation in field-induced multiferroic phases of Y-type hexaferrites
Open mechanistic, structural and functional questions for solid-state flip-flop supramolecular-rotator ferroelectrics: interaction balance, polar domains, Brownian-ratchet directionality, multiferroic coupling and zero-field bias detection
Microscopic mechanism and quantitative description of ultralow-current-density skyrmion-crystal flow in thin-plate FeGe devices
Quantitative, mechanism-resolved account of the enlarged skyrmion-crystal stability region in thin films of the chiral magnet Fe0.5Co0.5Si: stability mechanisms, three-dimensional structure, and magnetotransport signatures

Back to open problems

Microscopic origin, interface-state structure, and kinetics of forming and resistive switching at the Ti/Pr0.7Ca0.3MnO3 rectifying interface

Microscopic origin and quantitative physical characterization of the nanometric square skyrmion lattice in the centrosymmetric magnet GdRu2Si2 and the RM2X2 family

Microscopic origin of the hysteretic interface-type resistance switching at the epitaxial SrRuO3/SrTi0.99Nb0.01O3 Schottky junction

Microscopic origin and compensation of the interfacial magnetic dead layer in manganite/insulator tunnel junctions, and its quantitative link to room-temperature tunneling magnetoresistance

Vibrationally driven insulator-to-metal transition in magnetoresistive manganites: phonon-mode specificity, anharmonic energy redistribution, spin dynamics, and lifetime of the metastable metallic phase

Unique microscopic magnetic structure of the field-induced noncoplanar phase in bulk MnGe and the origin of its short, temperature-dependent helical period

Microscopic origin, stability conditions, and control of helicity reversals in dipolar skyrmion-bubble and stripe textures (random-chirality skyrmion lattices and multi-ring skyrmions)

Microscopic mechanism of the ionic-liquid-gate-induced bulk metal–insulator transition in vanadium dioxide films

Microscopic origin of the chirality-induced Hall anomaly in MnSi under pressure: texture identity, field thresholds, quantitative topological-charge mapping, and relation to the partial-order state

Quantitative microscopic origin of ferroelectricity and of its nonlinear pressure response in hydrogen-bonded supramolecular co-crystals of phenazine and anilic acids

The square meron–antimeron lattice in the chiral magnet Co8Zn9Mn3 and its transformation into a skyrmion lattice: three-dimensional magnetic configuration, strain and anisotropy control, transition energetics, and emergent electromagnetic response

Microscopic structure and formation mechanism of the current-stabilized conducting path in the light-induced insulator–metal transition of Pr0.7_{0.7}0.7​Ca0.3_{0.3}0.3​MnO3_33​

Microscopic origin of residual magnetic anisotropy and the quantitative polarization–spin-chirality relation in field-induced multiferroic phases of Y-type hexaferrites

Open mechanistic, structural and functional questions for solid-state flip-flop supramolecular-rotator ferroelectrics: interaction balance, polar domains, Brownian-ratchet directionality, multiferroic coupling and zero-field bias detection

Microscopic mechanism and quantitative description of ultralow-current-density skyrmion-crystal flow in thin-plate FeGe devices

Quantitative, mechanism-resolved account of the enlarged skyrmion-crystal stability region in thin films of the chiral magnet Fe0.5Co0.5Si: stability mechanisms, three-dimensional structure, and magnetotransport signatures

Microscopic structure and formation mechanism of the current-stabilized conducting path in the light-induced insulator–metal transition of Pr $_{0.7}$ Ca $_{0.3}$ MnO $_3$